Late at night, in the Ravenclaw common room, Andrew was still sitting on the sofa by the fire, absorbed in the newly acquired Atlas of Planetary Orbits. Time passed slowly, and before you knew it, the common room grew quieter and quieter, as if only two people were left sitting on the sofa. One was Andrew, and the other was you, who for some reason hadn't left. Andrew was completely absorbed in the world of the planetary trajectory atlas. He didn't notice the passage of time, let alone the new person sitting next to him. Andrew's eyes gradually became blurry. He blinked sleepily and subconsciously leaned his head on the shoulder of the person next to him……